<template>
    <div class="list" ref=wrapper>
    <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper" v-for="item of hot" v-bind:key="item.id" v-on:click="handleCityClick(item.name)">
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area" v-for="(item,key) of cities" v-bind:key="key" v-bind:ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom" v-for="innerItem of item" v-bind:key="innerItem.id" v-on:click="handleCityClick(innerItem.name)">
                    {{innerItem.name}} 
                </div>
            </div>
        </div>
    </div>
    </div>
</template>
 
 <script>
 import Bscroll from 'better-scroll'
 import { mapState, mapMutations } from 'vuex'
  export default {
    name: 'CityList',
        props: {
            hot: Array,
            cities: Object,
            letter: String,
        },
        computed: {
          ...mapState({
            currentCity: 'city'
          })
        },
        methods: {
          handleCityClick (city) {
            this.$store.commit('changeCity',city)
            this.$router.push('/')
          },
          ...mapMutations(['changeCity'])
        },
        watch: {
          letter () {
            if (this.letter) {
              const element = this.$refs[this.letter][0]
              this.scroll.scrollToElement(element)
            }
          }
        },
        mounted () {
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
  }
 </script>

<style lang="stylus" scoped>
  @import '~__STYLES__/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 2.38rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>